Ezechiel de Decker (c. 1603-c. 1647) was a Dutch surveyor and teacher of mathematics.
In 1625, De Decker entered a contract with Adriaan Vlacq for the publication of several translations of books by John Napier, Edmund Gunter and Henry Briggs. A first book was published in 1626, with several translationsdone by Vlacq. A second book was made of the logarithms of the first 10000 numbersfrom Briggs' Arithmetica logarithmica published in 1624. The logarithms were shortenedto 10 places. In 1627, De Decker's "Tweede deel" was published and it containedthe logarithms of all numbers from 1 to 100000, to 10 places. Only very few copies ofthis book are known and its publication was apparently stopped or delayed.In 1628, Vlacq's Arithmetica logarithmica was published and contained exactlythe tables published in 1627.